EP2911155B1 - Nuclear reactor fuel assembly - Google Patents
Nuclear reactor fuel assembly Download PDFInfo
- Publication number
- EP2911155B1 EP2911155B1 EP13848786.3A EP13848786A EP2911155B1 EP 2911155 B1 EP2911155 B1 EP 2911155B1 EP 13848786 A EP13848786 A EP 13848786A EP 2911155 B1 EP2911155 B1 EP 2911155B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel assembly
- nozzles
- locking device
- guide channels
- bearing plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003758 nuclear fuel Substances 0.000 title claims description 8
- 239000000446 fuel Substances 0.000 claims description 27
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
- G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
- G21C3/33—Supporting or hanging of elements in the bundle; Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
- G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
- G21C3/33—Supporting or hanging of elements in the bundle; Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles
- G21C3/3305—Lower nozzle
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
- G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
- G21C3/33—Supporting or hanging of elements in the bundle; Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles
- G21C3/3315—Upper nozzle
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
- G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
- G21C3/334—Assembling, maintenance or repair of the bundles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Definitions
- the invention relates to the field of nuclear engineering, in particular to a fuel assembly structure, and may be used in pressurized water reactors.
- a connecting structure for a fuel assembly is known (see RU2412492 of 11.12.2008, G21C3/33).
- This connecting structure for a fuel assembly comprises: a retaining sleeve comprising a protruding section formed on the top-end section of the sleeve; a top nozzle with a mounting opening formed therein, the end portion of the retaining sleeve being inserted into said opening, and a locking key that is installed inside the mounting opening of the retaining sleeve and has an opening area made on the key lower surface, said opening area having a shape corresponding to the protruding section.
- This structure eliminates the necessity of disassembling the components during connecting and disconnecting the top shank, which prevents foreign matter from entering inside and mixing with fuel.
- a drawback of this device is the presence of threading connections complicating quick connection/disconnection of a complex element of a fuel assembly.
- the closest to the claimed technical solution is a fuel assembly and a device for mounting/dismounting its top nozzle according to RU2075118 of 30.06.1992 , G21C3/32, G21C19/00 that is taken as the prototype.
- This fuel assembly comprises a bundle of fuel rods installed vertically in a frame assembled from spacer grids, and two nozzles, the top one and the bottom one.
- One of the fuel assembly nozzles (top nozzle) comprises a support plate and a bearing plate with openings clasping guide bushes with elements ensuring splitting of the nozzle with guide channels, and a locking device coupled to the bearing plate by means of a fastening means.
- the known structure enables to improve reliability of connecting the top nozzle to the guide channels and ensure mounting and dismounting of the nozzle assembled separately from the bundle and being a finished one-piece structure.
- a fuel assembly may be dismounted with the use of a device for removing the top nozzle at any stage of the fuel assembly life cycle. After installing the fuel assembly top nozzle onto the guide channels, it should be fastened.
- Fastening is performed with the use of arresters that are screwed onto each guide sleeve or are fastened with welded bottom portion.
- a drawback of this fuel assembly is the necessity of using a special device for mounting and dismounting the top nozzle, a great number of removable parts and a great number of welds necessary for fastening these removable parts (arresters), which all compromise manufacturability and increase manufacture work content. Moreover, welds are to be cut during dismounting, which may cause scale ingress into guide channels.
- US 5015435 A describes a sleeve for locking the guide tube having an outer surface comprising successivley a cylindrical and a frustoconical part in the axial direction, without any radially protruding part.
- US 4684500 A describes in a reconstitutable fuel assembly, a top nozzle attaching structure for mounting the top nozzle adapter plate in releasable locking engagement upon the guide thimble upper end portions includes several improved features.
- the present invention addresses the technical problem of creating a fuel assembly which is easier to load and unload, reduces a time period required for the mounting and removal of the nozzles during manufacture of the fuel assembly, and for refueling a reactor.
- the technical effect is the creation of a device without removable components, which makes possible to secure the nozzles in the guide channels simultaneously and exclude welds, thus reducing a time period required for mounting and dismounting nozzles, increasing manufacturability, simplifying and accelerating the fuel assembly manufacturing process and reducing the overall downtime of a nuclear reactor during repair of a fuel assembly at the time of refueling.
- the nuclear reactor fuel assembly comprising: a bundle of fuel rods; guide channels; two nozzles, one of the nozzles having a bearing plate with openings; elements for the detachable connection of the nozzles to the guide channels; a locking device for the detachable connection and a fastening means for the locking device, the elements for the detachable connection of the nozzles to the guide channels have a cross-section size greater than the size of the openings in the bearing plate of the nozzle. Furthermore, the elements for the detachable connection of the nozzles to the guide channels are designed in such a way that their cross-section can be decreased to enable passage through the openings in the bearing plate of the nozzle and are secured in the guide channels.
- the locking device is provided with bushes which secure the elements for the detachable connection of the nozzles to the guide channels, said bushes being arranged in the openings in the bearing plate.
- the locking device can be arranged in the two nozzles simultaneously.
- the fastening means for fastening the locking device to the bearing plate is formed as springloaded screws.
- the bushes of the locking device are formed as a single component.
- the proposed structure enables to reduce a time period required for performing operations of manufacturing and repairing a fuel assembly due to the possibility of securing one or both nozzles in the guide channels simultaneously and excluding removable components, improve manufacturability by reducing the number of fastening elements and simplifying their structure.
- the nuclear reactor fuel assembly consists of a bundle of fuel rods 1 clasped by spacer grids 2, guide channels 3, a top nozzle 4 and a bottom nozzle 5.
- the nozzle 4, 5 comprises a housing 6, a bearing plate 7, and a locking device 8.
- the bearing plate 7 is provided with openings 9 having a D1 size. These openings accommodate elements 10 ensuring detachability of connection between the nozzles and the guide channels, a cross-sectional D2 size of the elements 10 being greater than the D1 size of the openings 9 in the bearing plate of the nozzle.
- the elements 10 are rigidly fixed on the guide channels 3, and the locking device 8 for the detachable connection is provided with bushes 11 retaining the elements 10 and preventing removal of the nozzle 4, 5.
- the locking device 8 is fastened to the bearing plate 7 by means of a fastening means 12 in the form of spring loaded screws.
- All the bushes 11 of the locking device 8 are made as a single component.
- the elements 10 ensuring detachability of the connection between the nozzles and the guide channels may be made as collets having projections for resting on the bearing plate of the nozzle 4, 5.
- the collets are provided with cuts enabling each collet to deform for the purpose of converging of its projections in order the collet may pass into the opening in the nozzle bearing plate.
- the nuclear reactor fuel assembly works as follows.
- the locking device 8 is lifted and the elements 10 of the guide channels 3 are released. Then, the top nozzle 4 and/or the bottom nozzle 5 may be removed by means of standard equipment. After repair works on the fuel assembly are completed, the nozzle is installed onto the elements 10 of the guide channels 3. In order to fix the nozzle, the retaining bushes 11 of the locking device 8 are installed into the openings 9 in the bearing plate 7. After the nozzle 4 or 5 is arranged on the guide channels 3, the locking device 8 is fixed on the bearing plate 7 with the use of the fastening means. The fuel assembly is ready for operation.
- the use of a fuel assembly having the proposed structure enables to reduce a time period required for repair works and decrease a number of removable (not fastened) parts used in the fuel assembly structure.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Fuel-Injection Apparatus (AREA)
- Connection Of Plates (AREA)
Description
- The invention relates to the field of nuclear engineering, in particular to a fuel assembly structure, and may be used in pressurized water reactors.
- A connecting structure for a fuel assembly is known (see
RU2412492 - This structure eliminates the necessity of disassembling the components during connecting and disconnecting the top shank, which prevents foreign matter from entering inside and mixing with fuel.
- A drawback of this device is the presence of threading connections complicating quick connection/disconnection of a complex element of a fuel assembly.
- As to the technical essence and purpose, the closest to the claimed technical solution is a fuel assembly and a device for mounting/dismounting its top nozzle according to
RU2075118 of 30.06.1992 - This fuel assembly comprises a bundle of fuel rods installed vertically in a frame assembled from spacer grids, and two nozzles, the top one and the bottom one. One of the fuel assembly nozzles (top nozzle) comprises a support plate and a bearing plate with openings clasping guide bushes with elements ensuring splitting of the nozzle with guide channels, and a locking device coupled to the bearing plate by means of a fastening means.
- The known structure enables to improve reliability of connecting the top nozzle to the guide channels and ensure mounting and dismounting of the nozzle assembled separately from the bundle and being a finished one-piece structure. A fuel assembly may be dismounted with the use of a device for removing the top nozzle at any stage of the fuel assembly life cycle. After installing the fuel assembly top nozzle onto the guide channels, it should be fastened.
- Fastening is performed with the use of arresters that are screwed onto each guide sleeve or are fastened with welded bottom portion.
- A drawback of this fuel assembly is the necessity of using a special device for mounting and dismounting the top nozzle, a great number of removable parts and a great number of welds necessary for fastening these removable parts (arresters), which all compromise manufacturability and increase manufacture work content. Moreover, welds are to be cut during dismounting, which may cause scale ingress into guide channels.
-
US 5015435 A describes a sleeve for locking the guide tube having an outer surface comprising successivley a cylindrical and a frustoconical part in the axial direction, without any radially protruding part. -
US 4684500 A describes in a reconstitutable fuel assembly, a top nozzle attaching structure for mounting the top nozzle adapter plate in releasable locking engagement upon the guide thimble upper end portions includes several improved features. - The present invention addresses the technical problem of creating a fuel assembly which is easier to load and unload, reduces a time period required for the mounting and removal of the nozzles during manufacture of the fuel assembly, and for refueling a reactor.
- The invention is defined by the features of the independent claim. Preferred embodiments are defined by the features of the dependent claims.
- The technical effect is the creation of a device without removable components, which makes possible to secure the nozzles in the guide channels simultaneously and exclude welds, thus reducing a time period required for mounting and dismounting nozzles, increasing manufacturability, simplifying and accelerating the fuel assembly manufacturing process and reducing the overall downtime of a nuclear reactor during repair of a fuel assembly at the time of refueling.
- This technical effect is achieved owing to that, in the nuclear reactor fuel assembly comprising: a bundle of fuel rods; guide channels; two nozzles, one of the nozzles having a bearing plate with openings; elements for the detachable connection of the nozzles to the guide channels; a locking device for the detachable connection and a fastening means for the locking device, the elements for the detachable connection of the nozzles to the guide channels have a cross-section size greater than the size of the openings in the bearing plate of the nozzle. Furthermore, the elements for the detachable connection of the nozzles to the guide channels are designed in such a way that their cross-section can be decreased to enable passage through the openings in the bearing plate of the nozzle and are secured in the guide channels. The locking device is provided with bushes which secure the elements for the detachable connection of the nozzles to the guide channels, said bushes being arranged in the openings in the bearing plate.
- Furthermore, the locking device can be arranged in the two nozzles simultaneously. The fastening means for fastening the locking device to the bearing plate is formed as springloaded screws. The bushes of the locking device are formed as a single component.
- The proposed structure enables to reduce a time period required for performing operations of manufacturing and repairing a fuel assembly due to the possibility of securing one or both nozzles in the guide channels simultaneously and excluding removable components, improve manufacturability by reducing the number of fastening elements and simplifying their structure.
- The essence of the proposed technical solution is illustrated by the drawings, wherein:
-
Fig. 1 shows a general view of the nuclear reactor fuel assembly with removable nozzles; -
Fig. 2 shows a general view of a removable nozzle; -
Fig. 3 shows the locking device fastening assembly on the guide channels and the guide channel in the bearing plate. - The nuclear reactor fuel assembly consists of a bundle of fuel rods 1 clasped by spacer grids 2, guide channels 3, a top nozzle 4 and a bottom nozzle 5. The nozzle 4, 5 comprises a housing 6, a
bearing plate 7, and alocking device 8. Thebearing plate 7 is provided with openings 9 having a D1 size. These openings accommodateelements 10 ensuring detachability of connection between the nozzles and the guide channels, a cross-sectional D2 size of theelements 10 being greater than the D1 size of the openings 9 in the bearing plate of the nozzle. Theelements 10 are rigidly fixed on the guide channels 3, and thelocking device 8 for the detachable connection is provided withbushes 11 retaining theelements 10 and preventing removal of the nozzle 4, 5. - The
locking device 8 is fastened to thebearing plate 7 by means of a fastening means 12 in the form of spring loaded screws. - All the
bushes 11 of thelocking device 8 are made as a single component. - The
elements 10 ensuring detachability of the connection between the nozzles and the guide channels may be made as collets having projections for resting on the bearing plate of the nozzle 4, 5. The collets are provided with cuts enabling each collet to deform for the purpose of converging of its projections in order the collet may pass into the opening in the nozzle bearing plate. - The nuclear reactor fuel assembly works as follows.
- For conducting a repair it is necessary to remove the top nozzle 4 and/or the bottom nozzle 5 of the fuel assembly. In order to remove the nozzle, the
locking device 8 is lifted and theelements 10 of the guide channels 3 are released. Then, the top nozzle 4 and/or the bottom nozzle 5 may be removed by means of standard equipment. After repair works on the fuel assembly are completed, the nozzle is installed onto theelements 10 of the guide channels 3. In order to fix the nozzle, theretaining bushes 11 of thelocking device 8 are installed into the openings 9 in thebearing plate 7. After the nozzle 4 or 5 is arranged on the guide channels 3, thelocking device 8 is fixed on thebearing plate 7 with the use of the fastening means. The fuel assembly is ready for operation. - Thus, the use of a fuel assembly having the proposed structure enables to reduce a time period required for repair works and decrease a number of removable (not fastened) parts used in the fuel assembly structure.
Claims (3)
- A nuclear reactor fuel assembly, comprising:a bundle of fuel rods (1);guide channels (3);two nozzles (4, 5), one of the nozzles (4, 5) having a bearing plate (7) with openings (9);elements (10) for the detachable connection of the nozzles (4, 5) to the guide channels (3);a locking device (8) for the detachable connection and a fastening means (12) for the locking device (8), wherebythe elements (10) for the detachable connection of the nozzles (4, 5) to the guide channels (3) have a cross-section size greater than the size of the openings (9) in the bearing plate (7), said elements (10) are designed in such a way that their cross-section can be decreased to enable passage through the opening (9) in the bearing plate (7) of the nozzle (4, 5), and said elements (10) are secured in the guide channels (3); andthe locking device (8) is provided with bushes (11) which secure the elements (10) for the detachable connection of the nozzles (4, 5)to the guide channels (3) in the openings (9) in the bearing plate (7) of the nozzle (4, 5), andcharacterized in thatall bushes (11) of the locking device (8) are made as a single component.
- The nuclear reactor fuel assembly according to Claim 1, characterized in that the locking device (8) is arranged in the two nozzles (4, 5) simultaneously.
- The nuclear reactor fuel assembly according to Claim 1, characterized in that the fastening means (12) for fastening the locking device (8) to the bearing plate (7) is formed as springloaded screws.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2012144862/07A RU2546648C2 (en) | 2012-10-22 | 2012-10-22 | Nuclear reactor fuel assembly |
PCT/RU2013/000904 WO2014065711A1 (en) | 2012-10-22 | 2013-10-14 | Nuclear reactor fuel assembly |
Publications (4)
Publication Number | Publication Date |
---|---|
EP2911155A1 EP2911155A1 (en) | 2015-08-26 |
EP2911155A4 EP2911155A4 (en) | 2016-05-25 |
EP2911155B1 true EP2911155B1 (en) | 2018-03-07 |
EP2911155B8 EP2911155B8 (en) | 2018-07-18 |
Family
ID=50515264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13848786.3A Active EP2911155B8 (en) | 2012-10-22 | 2013-10-14 | Nuclear reactor fuel assembly |
Country Status (6)
Country | Link |
---|---|
US (1) | US9767928B2 (en) |
EP (1) | EP2911155B8 (en) |
CN (1) | CN204695791U (en) |
RU (1) | RU2546648C2 (en) |
WO (1) | WO2014065711A1 (en) |
ZA (1) | ZA201503543B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017085534A1 (en) | 2015-11-20 | 2017-05-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Dynamic downlink power allocation for supporting higher order modulation |
FI3564965T3 (en) * | 2016-12-29 | 2024-05-15 | Joint Stock Company Tvel | Nuclear reactor fuel assembly |
FI3564966T3 (en) * | 2016-12-29 | 2024-05-13 | Joint Stock Company Tvel | Nuclear reactor fuel assembly |
RU2759217C1 (en) * | 2018-07-04 | 2021-11-11 | Акционерное Общество "Твэл" | Nuclear reactor with pressurized water |
RU2732730C1 (en) * | 2020-05-15 | 2020-09-22 | Общество с ограниченной ответственностью "Александра-Плюс" | Fuel assembly manufacturing method |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4376092A (en) * | 1979-12-10 | 1983-03-08 | Westinghouse Electric Corp. | Nuclear fuel assembly wear sleeve |
US4631168A (en) * | 1983-09-30 | 1986-12-23 | Westinghouse Electric Corp. | Nuclear reactor fuel assembly with a removable top nozzle |
US4684500A (en) * | 1985-09-12 | 1987-08-04 | Westinghouse Electric Corp. | Guide thimble captured locking tube in a reconstitutable fuel assembly |
EP0360664B1 (en) * | 1988-09-19 | 1994-06-01 | Framatome | Removable fixture device for a guide tube of a fuel assembly end nozzle of a nuclear reactor |
RU2075118C1 (en) * | 1992-06-30 | 1997-03-10 | Акционерное Общество Открытого Типа "Новосибирский завод Химконцентратов" | Fuel assembly (variants) and device for it head mounting and demounting performance |
US5367548A (en) * | 1994-03-15 | 1994-11-22 | B&W Fuel Company | Guide tube retainer |
KR101474864B1 (en) * | 2007-12-26 | 2014-12-19 | 토륨 파워 인코포레이티드 | Nuclear reactor(variants), fuel assembly consisting of driver-breeding modules for a nuclear reactor(variants) and a fuel cell for a fuel assembly |
JP4709824B2 (en) | 2007-12-28 | 2011-06-29 | 三菱重工業株式会社 | Fuel assembly coupling structure |
-
2012
- 2012-10-22 RU RU2012144862/07A patent/RU2546648C2/en active
-
2013
- 2013-10-14 CN CN201390000831.8U patent/CN204695791U/en not_active Expired - Lifetime
- 2013-10-14 US US14/437,673 patent/US9767928B2/en active Active
- 2013-10-14 WO PCT/RU2013/000904 patent/WO2014065711A1/en active Application Filing
- 2013-10-14 EP EP13848786.3A patent/EP2911155B8/en active Active
-
2015
- 2015-05-20 ZA ZA2015/03543A patent/ZA201503543B/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP2911155B8 (en) | 2018-07-18 |
US9767928B2 (en) | 2017-09-19 |
ZA201503543B (en) | 2016-03-30 |
EP2911155A4 (en) | 2016-05-25 |
RU2546648C2 (en) | 2015-04-10 |
EP2911155A1 (en) | 2015-08-26 |
WO2014065711A1 (en) | 2014-05-01 |
RU2012144862A (en) | 2014-04-27 |
US20150302941A1 (en) | 2015-10-22 |
CN204695791U (en) | 2015-10-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2911155B1 (en) | Nuclear reactor fuel assembly | |
EP2256318A1 (en) | Combustor tail tube guide jig, method for removing combustor of gas turbine and method for fixing the same | |
EP2236883B1 (en) | Apparatus and system for dampening the vibration experienced by a sprager pipe | |
ZA200605111B (en) | Fuel assembly end cap comprising a coolant-flow-orienting nozzle and corresponding assembly | |
EP0140588B1 (en) | Nuclear reactor fuel assembly with a removable top nozzle | |
JPH034116B2 (en) | ||
EP2109113B1 (en) | Detachable nuclear reactor fuel assembly component | |
US4702882A (en) | Quick disconnect top nozzle for a nuclear fuel assembly | |
US4928291A (en) | Control cluster provided with removable control elements for a nuclear fuel reactor | |
JP2014160079A (en) | Fixed cluster having spider-shaped supporting body, core of pressurized-water reactor, nuclear fuel assembly, and assembly equipped with fixed cluster | |
JPS61226686A (en) | Fuel aggregate and locking-unlocking method of upper nozzle adapter plate thereof | |
JP6668421B2 (en) | Assembly for an SFR type reactor using a reversible non-weld connection between an assembly casing and an assembly element inserted into the assembly casing, and a method for assembling and disassembling the assembly | |
KR101778804B1 (en) | A protective grid attachment | |
KR20080030978A (en) | (top nozzle assembly with improved release and coupling configuration in remote distance) | |
EP0187651A1 (en) | Fixture for inserting locking tubes in reconstitutable nuclear fuel assemblies | |
JPS60111989A (en) | Fuel aggregate for nuclear reactor | |
JPH052280B2 (en) | ||
US4620960A (en) | Method and apparatus for removably mounting a top nozzle on a nuclear reactor fuel assembly | |
JPH0466319B2 (en) | ||
EP0889482A1 (en) | Tie plate quick release retaining device | |
RU2239891C2 (en) | Nuclear reactor fuel assembly | |
JP5823605B2 (en) | Lower nozzle for use with nuclear fuel assemblies | |
CZ2020611A3 (en) | Nuclear reactor fuel assembly | |
US20150059177A1 (en) | Method for removing an end cap of a combustor cap assembly | |
CN109955192A (en) | One kind is for underwater remote maintenance dismantling device experimental rig |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20150520 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAX | Request for extension of the european patent (deleted) | ||
RA4 | Supplementary search report drawn up and despatched (corrected) |
Effective date: 20160422 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: G21C 3/334 20060101ALI20160418BHEP Ipc: G21C 3/33 20060101AFI20160418BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20170928 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: ENIN, ANATOLIY ALEKSEEVICH Inventor name: ERSHOV, VALENTIN FEDOROVICH Inventor name: ROMANOV, ALEKSANDR IVANOVICH Inventor name: TKACHEV, ANDREY ALEKSANDROVICH Inventor name: SIMANOVSKAYA, IRINA EVGENJEVNA Inventor name: SAMOILOV, OLEG BORISOVICH Inventor name: SHUSTOV, MSTISLAV ALEKSANDROVICH Inventor name: DOLGOV, ALEKSEY BORISOVICH |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP Ref country code: AT Ref legal event code: REF Ref document number: 977373 Country of ref document: AT Kind code of ref document: T Effective date: 20180315 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602013034232 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: FELBER UND PARTNER AG, CH |
|
REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20180307 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
GRAT | Correction requested after decision to grant or after decision to maintain patent in amended form |
Free format text: ORIGINAL CODE: EPIDOSNCDEC |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180607 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 977373 Country of ref document: AT Kind code of ref document: T Effective date: 20180307 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180608 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180607 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 6 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602013034232 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180709 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 |
|
26N | No opposition filed |
Effective date: 20181210 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602013034232 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181014 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190501 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181014 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181014 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180307 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20131014 Ref country code: MK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180307 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180707 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20230914 Year of fee payment: 11 Ref country code: FI Payment date: 20230920 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20230920 Year of fee payment: 11 Ref country code: BE Payment date: 20230919 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20231019 Year of fee payment: 11 Ref country code: CH Payment date: 20231102 Year of fee payment: 11 |